The quantification method for nearly all markers (except BrDU) is quite confusive. And really, i do not know exactly what the results represents.
This is particularly true for the MR-GR immunostaining where all the cells in the GCL are labeled. A control without the primary antibody (specific labeling with the 2nd Ac) and another one without the secondary (optical cross-talk...) are required .
Further, why the authors only count 50 BrDU+ cells for zif268 and MR and 30 for Fos and GR? How these cells were selected? xhere in the DG (dorsal, intermediate, ventral HPC...).
Finally, i do not think that the stats are relevant. The N should be the number of animal and not the number of cells (with this low N number, it may explain why data are not normally distributed).